Description:

xzgv is a picture viewer for X, with a thumbnail-based file selector.
It uses GTK+ and Imlib. Most file formats are supported, and the thumbnails
used are compatible with xv, zgv, and the Gimp.

xzgv differs from other picture viewers for X in that it uses one window
for both the file selector and viewer, it (unlike xv) allows both scrolling
and fit-to-window methods of viewing large pictures, and it (unlike xv and
some others) doesn't ever mangle the picture's aspect ratio without you telling
it to. It also provides extensive keyboard support; if you prefer using the
keyboard, this is almost certainly the best viewer for you. But it doesn't
skimp on the mousey stuff, either - you can click on a picture to view it,
drag the picture around to scroll (or use the scrollbars), it has menus, all
that. So anyway, it's just terribly great. :-)